{"id":39816,"date":"2021-02-04T23:59:26","date_gmt":"2021-02-04T23:59:26","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=39816"},"modified":"2021-02-05T04:18:25","modified_gmt":"2021-02-05T04:18:25","slug":"cold-temperatures-across-the-north-slope-of-alaska","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/39816","title":{"rendered":"Cold temperatures across the North Slope of Alaska"},"content":{"rendered":"<p><div style=\"width: 656px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2021\/02\/210204_suomiNPP_viirs_infrared_AK_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2021\/02\/210204_suomiNPP_viirs_infrared_AK_anim.gif\" alt=\"Suomi NPP VIIRS Infrared Window (11.45 \u00b5m) images [click to enlarge]\" width=\"646\" height=\"302\" \/><\/a><p class=\"wp-caption-text\">Suomi NPP VIIRS Infrared Window <em>(11.45 \u00b5m)<\/em> images [click to enlarge]<\/p><\/div>Suomi NPP VIIRS Infrared Window (11.45 \u00b5m) images<em><strong> (above)<\/strong> <\/em>revealed a large area of cold surface infrared brightness temperatures across much of the North Slope of Alaska on 04 February 2021 &#8212; with the coldest IR temperature being -56\u00baC <em>(darker shades of violet)<\/em> about 30 miles south-southeast of Umiat (PAUM) on the 1221 UTC image. The surface air temperature at the nearby <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2021\/02\/210204_umiat_obs.png\"><strong>Umiat RAWS site<\/strong><\/a> around that time was -55\u00baF (-48.3\u00baC). Narrow fingers of cold air drainage into some of the river valleys along the northern slopes of the Brooks Range (<a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2021\/02\/ak_topo-20210204_104056.png\"><strong>topography<\/strong><\/a>) were also apparent.<\/p>\n<p>The corresponding GOES-17 &#8220;Clean&#8221; Infrared Window (10.35 \u00b5m) images<em><strong> (below) <\/strong><\/em>also showed the large area of cold surface IR brightness temperatures, but the temperatures were not as cold (in the -40 to -50\u00baC range), and the small-scale signatures of various topographical features were not depicted.<\/p>\n<p><div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2021\/02\/210204_goes17_infrared_AK_anim.gif\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2021\/02\/210204_goes17_infrared_AK_anim.gif\" alt=\"GOES-17 &quot;Clean&quot; Infrared Window (10.35 \u00b5m) images [click to enlarge]\" width=\"640\" height=\"298\" \/><\/a><p class=\"wp-caption-text\">GOES-17 &#8220;Clean&#8221; Infrared Window <em>(10.35 \u00b5m)<\/em> images [click to enlarge]<\/p><\/div>A toggle between Infrared Window images from Suomi NPP VIIRS and GOES-17 (10.35 \u00b5m) at 1223 UTC is shown below.<\/p>\n<div style=\"width: 651px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2021\/02\/210204_suomiNPP_goes17_infrared_AK_anim.gif\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2021\/02\/210204_suomiNPP_goes17_infrared_AK_anim.gif\" alt=\"Infrared Window images from Suomi NPP VIIRS and GOES-17 (10.35 \u00b5m) at 1223 UTC [click to enlarge]\" width=\"641\" height=\"300\" \/><\/a><p class=\"wp-caption-text\">Infrared Window images from Suomi NPP VIIRS<em> (11.45 \u00b5m)<\/em> and GOES-17 <em>(10.35 \u00b5m)<\/em> at 1223 UTC [click to enlarge]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Suomi NPP VIIRS Infrared Window (11.45 \u00b5m) images (above) revealed a large area of cold surface infrared brightness temperatures across much of the North Slope of Alaska on 04 February 2021 &#8212; with the coldest IR temperature being -56\u00baC (darker shades of violet) about 30 miles south-southeast of Umiat (PAUM) on the 1221 UTC image. [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":39818,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37,80,49,48,5],"tags":[],"class_list":["post-39816","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-arctic","category-goes-17","category-suomi_npp","category-viirs","category-winter-weather"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/39816","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=39816"}],"version-history":[{"count":5,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/39816\/revisions"}],"predecessor-version":[{"id":39822,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/39816\/revisions\/39822"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/39818"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=39816"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=39816"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=39816"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}